// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_CERT_CRL_SET_STORAGE_H_
#define NET_CERT_CRL_SET_STORAGE_H_

#include <string>
#include <utility>
#include <vector>

#include "base/strings/string_piece.h"
#include "net/base/net_export.h"
#include "net/cert/crl_set.h"

namespace base {
class DictionaryValue;
}

namespace net {

// Static helpers to save and load CRLSet.
class NET_EXPORT CRLSetStorage {
public:
    // Parse parses the bytes in |data| and, on success, puts a new CRLSet in
    // |out_crl_set| and returns true.
    static bool Parse(base::StringPiece data,
        scoped_refptr<CRLSet>* out_crl_set);

    // ApplyDelta returns a new CRLSet in |out_crl_set| that is the result of
    // updating |in_crl_set| with the delta information in |delta_bytes|.
    static bool ApplyDelta(const CRLSet* in_crl_set,
        const base::StringPiece& delta_bytes,
        scoped_refptr<CRLSet>* out_crl_set);

    // GetIsDeltaUpdate extracts the header from |bytes|, sets *is_delta to
    // whether |bytes| is a delta CRL set or not and returns true. In the event
    // of a parse error, it returns false.
    static bool GetIsDeltaUpdate(const base::StringPiece& bytes, bool* is_delta);

    // Serialize returns a string of bytes suitable for passing to Parse. Parsing
    // and serializing a CRLSet is a lossless operation - the resulting bytes
    // will be equal.
    static std::string Serialize(const CRLSet* crl_set);

private:
    // CopyBlockedSPKIsFromHeader sets |blocked_spkis_| to the list of values
    // from "BlockedSPKIs" in |header_dict|.
    static bool CopyBlockedSPKIsFromHeader(CRLSet* crl_set,
        base::DictionaryValue* header_dict);
};

} // namespace net

#endif // NET_CERT_CRL_SET_STORAGE_H_
